2026-09-11T21:15:03.313616Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="compile_runtime"}: package build phase finished phase="compile_runtime" elapsed_ms=1 success=true
2026-09-11T21:15:08.840027Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened exchange table geometry expansion_ms=971 expansion_and_footprint_ms=1216 estimated_row_bytes=30424 heuristic_row_bytes=40612 geometry_fragments_per_tile=3150 fragment_limit=16384
2026-09-11T21:15:08.855709Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:15:08.945283Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:08.945316Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=4 initial_horizon=8173 selected_horizon=8173 endpoint_lower_bound=6912 lower_bound_gap=1261 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:08.946759Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=4 tile=23 row_words=42 horizon=8173
2026-09-11T21:15:08.950968Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:08.950992Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:08.952391Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:15:09.049945Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:09.049985Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:09.055075Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:15:09.820596Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:15:09.820641Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:09.851771Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:15:09.888611Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T21:15:09.922878Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:15:09.922906Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:09.931172Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:15:10.337740Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:15:10.337783Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:10.366489Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:15:10.366529Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=8 initial_horizon=12167 selected_horizon=12167 endpoint_lower_bound=8832 lower_bound_gap=3335 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:10.373016Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:15:10.410160Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12167
2026-09-11T21:15:12.163136Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:15:12.163183Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:12.361076Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:15:12.757784Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:15:12.757828Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=6 initial_horizon=7575 selected_horizon=7575 endpoint_lower_bound=6984 lower_bound_gap=591 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:12.832131Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=6 tile=626 row_words=754 horizon=7575
2026-09-11T21:15:13.133906Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:15:13.133952Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=5 initial_horizon=11672 selected_horizon=11672 endpoint_lower_bound=6912 lower_bound_gap=4760 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:13.357477Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=5 tile=79 row_words=2717 horizon=11672
2026-09-11T21:15:13.387455Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=6 success=true
2026-09-11T21:15:13.388174Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=artifacts/fp8-attention-20260911/source/gemm_f16_amp.S name="gemm_f8_interleaved_k96_c32_r145_r146" target=ipu21
2026-09-11T21:15:13.440235Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/0e97ff00e3904078524e58b16c5a2700d583755991a88e10b425a9e52cf3b1bb/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/0e97ff00e3904078524e58b16c5a2700d583755991a88e10b425a9e52cf3b1bb/kernel.json
2026-09-11T21:15:13.440551Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=artifacts/fp8-attention-20260911/source/gemm_f16_amp.S name="gemm_f8_interleaved_k96_c48_r145_r146" target=ipu21
2026-09-11T21:15:13.485303Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/f98a11e5a595b6a8ae73e9c9352dfb30807897ffbeb06e4ea680ad920e0b38f2/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/f98a11e5a595b6a8ae73e9c9352dfb30807897ffbeb06e4ea680ad920e0b38f2/kernel.json
2026-09-11T21:15:13.486445Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: compiling kernel source=artifacts/fp8-attention-20260911/source/gemm_f16_amp.S name="gemm_f16_interleaved_k96_c80_r66_r67" target=ipu21
2026-09-11T21:15:13.530935Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: kernel artifact created object=/srv/home/.cache/ipu-stack/kernels/72bf9b39c5c2a5cb49bddd9c6581c9c31a064940390186d1fef211ec633d9b42/kernel.o metadata=/srv/home/.cache/ipu-stack/kernels/72bf9b39c5c2a5cb49bddd9c6581c9c31a064940390186d1fef211ec633d9b42/kernel.json
2026-09-11T21:15:13.534058Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=146 success=true
2026-09-11T21:15:13.535173Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:15:13.554149Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: exchange table and repeat patch storage exchange_table_bytes=21008 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:15:13.648651Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=28 success=true
2026-09-11T21:15:13.648726Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: placing generated tile programs linked_end=322776 host_code_base=376832 host_code_bytes=860 generated_code_bytes=2716 exchange_table_bytes=21008 executable_ranges=[(377760, 524288)]
2026-09-11T21:15:13.648750Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: allocated package support memory linked_end=322776 profile_bytes=192 exchange_table_bytes=21008 host_code_bytes=860 host_data_bytes=656 generated_code_bytes=2716 code_address=377760 available_ranges=[(327680, 360448), (362864, 376832), (425984, 524288), (524480, 949168)]
2026-09-11T21:15:13.717316Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=68 success=true
2026-09-11T21:15:13.728413Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:15:13.740034Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:15:13.740794Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:13.740817Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:13.743299Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:15:13.776033Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:13.776067Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=8173 selected_horizon=8173 endpoint_lower_bound=6912 lower_bound_gap=1261 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:13.777535Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=23 row_words=42 horizon=8173
2026-09-11T21:15:13.817322Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:15:13.821794Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:13.821834Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:13.826787Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:15:14.512385Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:15:14.536756Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:15:14.536777Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:14.568618Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:15:15.013152Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:15:15.055709Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:15:15.055754Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:15.092310Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:15:15.502045Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:15:15.527664Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:15:15.527689Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:15.537130Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:15:16.395709Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:15:16.395747Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:16.432607Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:15:16.438191Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:15:16.533518Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:15:16.533555Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:16.717285Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:15:17.304220Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:15:17.403478Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:15:17.403510Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=7575 selected_horizon=7575 endpoint_lower_bound=6984 lower_bound_gap=591 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:17.477428Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=626 row_words=754 horizon=7575
2026-09-11T21:15:20.538808Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:15:20.538851Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=11773 selected_horizon=11773 endpoint_lower_bound=6912 lower_bound_gap=4861 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:20.745793Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=68 row_words=2686 horizon=11773
2026-09-11T21:15:20.770756Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=7053 success=true
2026-09-11T21:15:22.870845Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:15:22.871871Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:15:22.872024Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:22.872046Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=8173 selected_horizon=8173 endpoint_lower_bound=6912 lower_bound_gap=1261 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:22.872697Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:22.872718Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:22.874363Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=23 row_words=42 horizon=8173
2026-09-11T21:15:22.875323Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:15:22.930392Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:15:22.954986Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:15:22.959430Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:22.959459Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:22.964178Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:15:23.471552Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:15:23.492269Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:15:23.492288Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:23.512570Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:15:23.790298Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:15:23.813112Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:15:23.813133Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:23.839519Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:15:24.184414Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:15:24.203614Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:15:24.203635Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:24.210875Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:15:25.173015Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:15:25.173057Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:25.217163Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:15:25.489122Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:15:25.534972Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:15:25.534996Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=11773 selected_horizon=11773 endpoint_lower_bound=6912 lower_bound_gap=4861 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:25.582283Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:15:25.656932Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:15:25.656960Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=7575 selected_horizon=7575 endpoint_lower_bound=6984 lower_bound_gap=591 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:25.687253Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=68 row_words=2686 horizon=11773
2026-09-11T21:15:25.702046Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:15:25.710878Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=626 row_words=754 horizon=7575
2026-09-11T21:15:25.773403Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:15:25.773429Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:25.960980Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:15:26.014648Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=253507379200 score=109181640704 baseline_cycles=85944 candidate_cycles=83768 row_bytes=20752 row_capacity=32704 accepted=true
2026-09-11T21:15:26.109167Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=5338 success=true
2026-09-11T21:15:26.113156Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: costed final placed program final_cycles=264494 final_exchange=90368
2026-09-11T21:15:26.233617Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=49 success=true
2026-09-11T21:15:26.258130Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=24 success=true
2026-09-11T21:15:26.471710Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=200 success=true
2026-09-11T21:15:26.544867Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: validated canonical baseline cycles=264494
2026-09-11T21:15:28.194001Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened tile mappings by exchange resource load candidates=155 baseline_cycles=72496 candidate_cycles=69868 baseline_pressure=47629 candidate_pressure=48036
2026-09-11T21:15:29.329232Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: screened exchange table geometry expansion_ms=798 expansion_and_footprint_ms=1060 estimated_row_bytes=30424 heuristic_row_bytes=40612 geometry_fragments_per_tile=3150 fragment_limit=16384
2026-09-11T21:15:29.349821Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:15:29.453715Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:29.453752Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=4 initial_horizon=9419 selected_horizon=9419 endpoint_lower_bound=6912 lower_bound_gap=2507 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:29.455526Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=4 tile=77 row_words=42 horizon=9419
2026-09-11T21:15:29.456058Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:29.456088Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=2 initial_horizon=8015 selected_horizon=8015 endpoint_lower_bound=7872 lower_bound_gap=143 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:29.458060Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=2 tile=497 row_words=13 horizon=8015
2026-09-11T21:15:29.521670Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:29.521710Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=10 initial_horizon=2458 selected_horizon=2458 endpoint_lower_bound=2304 lower_bound_gap=154 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:29.526820Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=10 tile=280 row_words=112 horizon=2458
2026-09-11T21:15:29.793694Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:15:29.793738Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=0 initial_horizon=14202 selected_horizon=14202 endpoint_lower_bound=14016 lower_bound_gap=186 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:29.803284Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=0 tile=57 row_words=172 horizon=14202
2026-09-11T21:15:30.895474Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:15:30.895516Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=8 initial_horizon=12313 selected_horizon=12313 endpoint_lower_bound=8832 lower_bound_gap=3481 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:30.937005Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:15:30.937045Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=7 initial_horizon=8347 selected_horizon=8347 endpoint_lower_bound=3480 lower_bound_gap=4867 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:30.941828Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=8 tile=841 row_words=265 horizon=12313
2026-09-11T21:15:30.977702Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=7 tile=630 row_words=319 horizon=8347
2026-09-11T21:15:32.429068Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:15:32.429111Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=3 initial_horizon=4023 selected_horizon=4023 endpoint_lower_bound=3456 lower_bound_gap=567 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:32.616823Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=3 tile=86 row_words=1004 horizon=4023
2026-09-11T21:15:33.451360Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:15:33.451400Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=5 initial_horizon=11117 selected_horizon=11117 endpoint_lower_bound=6912 lower_bound_gap=4205 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:33.673500Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=5 tile=274 row_words=2671 horizon=11117
2026-09-11T21:15:37.206831Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: compared ordinary and paired exchange schedules phase=6 candidates=6080 ordinary_horizon=7613 paired_horizon=9166 use_paired=false
2026-09-11T21:15:37.370924Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:15:37.370957Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=6 initial_horizon=7613 selected_horizon=7613 endpoint_lower_bound=6984 lower_bound_gap=629 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:37.441235Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=6 tile=166 row_words=736 horizon=7613
2026-09-11T21:15:38.273907Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:15:38.273945Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: optimized physical exchange schedule phase=9 initial_horizon=3216 selected_horizon=3216 endpoint_lower_bound=2640 lower_bound_gap=576 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:38.311182Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: finished large physical exchange phase phase=9 tile=1074 row_words=149 horizon=3216
2026-09-11T21:15:38.331109Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=7 success=true
2026-09-11T21:15:38.333009Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=1 success=true
2026-09-11T21:15:38.335775Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:15:38.366818Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: exchange table and repeat patch storage exchange_table_bytes=20464 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:15:38.503195Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=27 success=true
2026-09-11T21:15:38.503322Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: placing generated tile programs linked_end=322776 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2716 exchange_table_bytes=20464 executable_ranges=[(377776, 524288)]
2026-09-11T21:15:38.503347Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: allocated package support memory linked_end=322776 profile_bytes=192 exchange_table_bytes=20464 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2716 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (425984, 524288), (524480, 949168)]
2026-09-11T21:15:38.568873Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=65 success=true
2026-09-11T21:15:38.583420Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:15:38.583976Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:38.583989Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8015 selected_horizon=8015 endpoint_lower_bound=7872 lower_bound_gap=143 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:38.585655Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=497 row_words=13 horizon=8015
2026-09-11T21:15:38.601654Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:38.601687Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=9419 selected_horizon=9419 endpoint_lower_bound=6912 lower_bound_gap=2507 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:38.603588Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=77 row_words=42 horizon=9419
2026-09-11T21:15:38.619052Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:15:38.675744Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:15:38.680429Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:38.680451Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2458 selected_horizon=2458 endpoint_lower_bound=2304 lower_bound_gap=154 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:38.685780Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=280 row_words=112 horizon=2458
2026-09-11T21:15:38.884454Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:15:38.912723Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:15:38.912755Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14202 selected_horizon=14202 endpoint_lower_bound=14016 lower_bound_gap=186 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:38.923248Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=57 row_words=172 horizon=14202
2026-09-11T21:15:39.422179Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:15:39.450807Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:15:39.450841Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3216 selected_horizon=3216 endpoint_lower_bound=2640 lower_bound_gap=576 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:39.491031Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=1074 row_words=149 horizon=3216
2026-09-11T21:15:40.055528Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:15:40.105095Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:15:40.105138Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8347 selected_horizon=8347 endpoint_lower_bound=3480 lower_bound_gap=4867 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:40.160732Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=630 row_words=319 horizon=8347
2026-09-11T21:15:41.686193Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:15:41.705822Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:15:41.705893Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12112 selected_horizon=12112 endpoint_lower_bound=8832 lower_bound_gap=3280 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:41.769446Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=841 row_words=265 horizon=12112
2026-09-11T21:15:41.788916Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:15:41.788963Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4023 selected_horizon=4023 endpoint_lower_bound=3456 lower_bound_gap=567 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:41.993873Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=86 row_words=1004 horizon=4023
2026-09-11T21:15:42.981961Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:15:43.097582Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:15:43.097639Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=7613 selected_horizon=7613 endpoint_lower_bound=6984 lower_bound_gap=629 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:43.190502Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=166 row_words=736 horizon=7613
2026-09-11T21:15:46.338779Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:15:46.338836Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=11019 selected_horizon=11019 endpoint_lower_bound=6912 lower_bound_gap=4107 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:46.501872Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=166 row_words=2634 horizon=11019
2026-09-11T21:15:46.538770Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=7969 success=true
2026-09-11T21:15:49.165219Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:15:49.170373Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:15:49.171273Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:49.171298Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8015 selected_horizon=8015 endpoint_lower_bound=7872 lower_bound_gap=143 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:49.173692Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=497 row_words=13 horizon=8015
2026-09-11T21:15:49.182307Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:15:49.183466Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:49.183491Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=9419 selected_horizon=9419 endpoint_lower_bound=6912 lower_bound_gap=2507 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:49.185487Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=77 row_words=42 horizon=9419
2026-09-11T21:15:50.107836Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:15:50.169247Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:15:50.169304Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3216 selected_horizon=3216 endpoint_lower_bound=2640 lower_bound_gap=576 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:50.207887Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=1074 row_words=149 horizon=3216
2026-09-11T21:15:50.743743Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:15:50.823117Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:15:50.823195Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12112 selected_horizon=12112 endpoint_lower_bound=8832 lower_bound_gap=3280 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:50.878343Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=841 row_words=265 horizon=12112
2026-09-11T21:15:52.242893Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:15:52.242963Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6139 selected_horizon=6139 endpoint_lower_bound=3480 lower_bound_gap=2659 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:52.297719Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=630 row_words=303 horizon=6139
2026-09-11T21:15:52.400833Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:15:52.406457Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:52.406499Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2458 selected_horizon=2458 endpoint_lower_bound=2304 lower_bound_gap=154 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:52.413056Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=280 row_words=112 horizon=2458
2026-09-11T21:15:53.591801Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:15:53.712301Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:15:53.712364Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=7613 selected_horizon=7613 endpoint_lower_bound=6984 lower_bound_gap=629 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:53.797157Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=166 row_words=736 horizon=7613
2026-09-11T21:15:55.377434Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:15:55.482362Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:15:55.482408Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4023 selected_horizon=4023 endpoint_lower_bound=3456 lower_bound_gap=567 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:55.677546Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=86 row_words=1004 horizon=4023
2026-09-11T21:15:56.020926Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:15:56.048419Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:15:56.079750Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:15:56.079814Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14202 selected_horizon=14202 endpoint_lower_bound=14016 lower_bound_gap=186 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:56.095947Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=57 row_words=172 horizon=14202
2026-09-11T21:15:56.102916Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:15:56.102975Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=11019 selected_horizon=11019 endpoint_lower_bound=6912 lower_bound_gap=4107 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:15:56.339859Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=166 row_words=2634 horizon=11019
2026-09-11T21:15:56.402865Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=253507379200 score=109181640704 baseline_cycles=86695 candidate_cycles=84487 row_bytes=20352 row_capacity=32704 accepted=true
2026-09-11T21:15:56.553830Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=10014 success=true
2026-09-11T21:15:56.560355Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: costed final placed program final_cycles=265213 final_exchange=91087
2026-09-11T21:15:56.691072Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=53 success=true
2026-09-11T21:15:56.733140Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=41 success=true
2026-09-11T21:15:56.974554Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=219 success=true
2026-09-11T21:15:57.064530Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: retained incumbent tile mapping
2026-09-11T21:15:57.601378Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: evaluating ordered local candidates concurrently candidates=3 threads=12
2026-09-11T21:15:58.813475Z  INFO local_candidate{attempt=1}: screened exchange table geometry expansion_ms=914 expansion_and_footprint_ms=1211 estimated_row_bytes=22640 heuristic_row_bytes=41912 geometry_fragments_per_tile=2506 fragment_limit=16384
2026-09-11T21:15:58.842012Z  INFO local_candidate{attempt=1}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:15:58.868734Z  INFO local_candidate{attempt=2}: screened exchange table geometry expansion_ms=963 expansion_and_footprint_ms=1267 estimated_row_bytes=23360 heuristic_row_bytes=41912 geometry_fragments_per_tile=2564 fragment_limit=16384
2026-09-11T21:15:58.889162Z  INFO local_candidate{attempt=2}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:15:58.909444Z  INFO local_candidate{attempt=3}: screened exchange table geometry expansion_ms=994 expansion_and_footprint_ms=1307 estimated_row_bytes=30016 heuristic_row_bytes=38992 geometry_fragments_per_tile=3099 fragment_limit=16384
2026-09-11T21:15:58.929432Z  INFO local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:15:58.970843Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:15:58.970887Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:58.972456Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T21:15:59.036046Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:15:59.036098Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:59.038441Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:15:59.066163Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:15:59.066239Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:15:59.071456Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:00.040222Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:00.040287Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.069972Z  INFO local_candidate{attempt=2}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T21:16:00.081359Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:00.084440Z  INFO local_candidate{attempt=3}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T21:16:00.108227Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:00.108284Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.114234Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:00.114281Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.126060Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:00.126739Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:00.126780Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.139488Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:00.148817Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:00.168886Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:00.168938Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.171033Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:00.181445Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:00.181485Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.183482Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:00.271827Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:00.271894Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.278883Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:00.307670Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:00.307711Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.310161Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T21:16:00.330720Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:16:00.330754Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.332655Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T21:16:00.715864Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:00.715936Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=8 initial_horizon=12097 selected_horizon=12097 endpoint_lower_bound=8832 lower_bound_gap=3265 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.774854Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=8 tile=933 row_words=262 horizon=12097
2026-09-11T21:16:00.833841Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:00.833908Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.881246Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:00.885865Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:00.885918Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=12097 selected_horizon=12097 endpoint_lower_bound=8832 lower_bound_gap=3265 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:00.943635Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=933 row_words=262 horizon=12097
2026-09-11T21:16:02.102448Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:02.102507Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:02.117802Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:02.117860Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:02.144626Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:02.165872Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:02.281902Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:02.281967Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:02.289530Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:02.484814Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:02.484874Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:02.697952Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:02.698038Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=8 initial_horizon=12097 selected_horizon=12097 endpoint_lower_bound=8832 lower_bound_gap=3265 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:02.699599Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:02.756692Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=8 tile=933 row_words=262 horizon=12097
2026-09-11T21:16:03.239384Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:03.239442Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:03.255601Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:16:03.255666Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=7575 selected_horizon=7575 endpoint_lower_bound=6984 lower_bound_gap=591 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:03.293465Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T21:16:03.293525Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=5 initial_horizon=8460 selected_horizon=8460 endpoint_lower_bound=6912 lower_bound_gap=1548 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:03.325999Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:03.340388Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=626 row_words=754 horizon=7575
2026-09-11T21:16:03.479596Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T21:16:03.671320Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:03.671375Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:03.809199Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:03.809277Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:03.872449Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:04.015080Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:04.104871Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:04.104928Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:04.155372Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:04.396892Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:16:04.396961Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=5 initial_horizon=9702 selected_horizon=9702 endpoint_lower_bound=6600 lower_bound_gap=3102 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:04.436858Z  INFO local_candidate{attempt=1}: compared ordinary and paired exchange schedules phase=0 candidates=2105 ordinary_horizon=14130 paired_horizon=18454 use_paired=false
2026-09-11T21:16:04.485365Z  INFO local_candidate{attempt=1}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:04.485419Z  INFO local_candidate{attempt=1}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:04.499199Z  INFO local_candidate{attempt=1}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:04.524707Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=13 success=true
2026-09-11T21:16:04.526878Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=2 success=true
2026-09-11T21:16:04.529051Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:16:04.559898Z  INFO local_candidate{attempt=1}: exchange table and repeat patch storage exchange_table_bytes=14448 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:16:04.613073Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=65 row_words=2640 horizon=9702
2026-09-11T21:16:04.673506Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=17 success=true
2026-09-11T21:16:04.678359Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=4 success=true
2026-09-11T21:16:04.683943Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:16:04.732130Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=47 success=true
2026-09-11T21:16:04.732182Z  INFO local_candidate{attempt=1}: placing generated tile programs linked_end=323352 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2752 exchange_table_bytes=14448 executable_ranges=[(377776, 524288)]
2026-09-11T21:16:04.732215Z  INFO local_candidate{attempt=1}: allocated package support memory linked_end=323352 profile_bytes=200 exchange_table_bytes=14448 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2752 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T21:16:04.735029Z  INFO local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=20564 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:16:04.823406Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=91 success=true
2026-09-11T21:16:04.839823Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:04.846649Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:04.847612Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:04.847637Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:04.850435Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:04.904850Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:04.910447Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:04.910479Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:04.916888Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:04.935063Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:16:04.935117Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:04.936874Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T21:16:04.975912Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=97 success=true
2026-09-11T21:16:04.975969Z  INFO local_candidate{attempt=3}: placing generated tile programs linked_end=322776 host_code_base=376832 host_code_bytes=860 generated_code_bytes=2636 exchange_table_bytes=20564 executable_ranges=[(377760, 524288)]
2026-09-11T21:16:04.975985Z  INFO local_candidate{attempt=3}: allocated package support memory linked_end=322776 profile_bytes=192 exchange_table_bytes=20564 host_code_bytes=860 host_data_bytes=656 generated_code_bytes=2636 code_address=377760 available_ranges=[(327680, 360448), (362864, 376832), (425984, 524288), (524480, 949168)]
2026-09-11T21:16:05.008330Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T21:16:05.008388Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=5 initial_horizon=9031 selected_horizon=9031 endpoint_lower_bound=6912 lower_bound_gap=2119 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:05.086606Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=110 success=true
2026-09-11T21:16:05.220868Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T21:16:05.335584Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=6 transfers=32942 maximum_identical_destinations=1
2026-09-11T21:16:05.335639Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=6 initial_horizon=16793 selected_horizon=16793 endpoint_lower_bound=13128 lower_bound_gap=3665 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:05.417348Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=6 tile=385 row_words=748 horizon=16793
2026-09-11T21:16:05.578275Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:05.607332Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:05.607367Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:05.620465Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:05.650125Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:05.668283Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:05.668845Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:05.668862Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:05.670978Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:05.830849Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:05.873598Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:05.873648Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:05.919872Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:06.022156Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:06.029818Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:06.029851Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:06.036646Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:06.060067Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:06.061045Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:06.061086Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:06.063629Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T21:16:06.505661Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:06.523970Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:06.546938Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:06.546979Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:06.576910Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:06.576966Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:06.593135Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:06.626299Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:07.022618Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:07.079305Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:07.079344Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:07.133434Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:07.499276Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:07.499346Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:07.540828Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:07.663965Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:07.742886Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T21:16:07.742938Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=8460 selected_horizon=8460 endpoint_lower_bound=6912 lower_bound_gap=1548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:07.881232Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T21:16:07.894768Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:07.988011Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:07.988066Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:08.122951Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:08.195819Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:08.198237Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:16:08.198277Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=7575 selected_horizon=7575 endpoint_lower_bound=6984 lower_bound_gap=591 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:08.259685Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=626 row_words=754 horizon=7575
2026-09-11T21:16:08.324989Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:08.325052Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:08.396989Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:08.717934Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:08.803735Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:08.803784Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:08.887163Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:08.916659Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:08.916704Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:08.928073Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:09.001854Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:09.060230Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:09.177608Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:09.177667Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:09.277143Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:09.341095Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=15 success=true
2026-09-11T21:16:09.343306Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=2 success=true
2026-09-11T21:16:09.345368Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:16:09.377983Z  INFO local_candidate{attempt=2}: exchange table and repeat patch storage exchange_table_bytes=15096 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:16:09.544839Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=47 success=true
2026-09-11T21:16:09.544891Z  INFO local_candidate{attempt=2}: placing generated tile programs linked_end=323352 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2752 exchange_table_bytes=15096 executable_ranges=[(377776, 524288)]
2026-09-11T21:16:09.544909Z  INFO local_candidate{attempt=2}: allocated package support memory linked_end=323352 profile_bytes=200 exchange_table_bytes=15096 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2752 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T21:16:09.651612Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=106 success=true
2026-09-11T21:16:09.676780Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:09.690494Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:16:09.690548Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:09.692519Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T21:16:09.762383Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:09.768917Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:09.768949Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:09.775083Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:10.595773Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:10.630971Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:10.631014Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:10.672759Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:10.705645Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:10.707042Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:10.707068Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:10.709369Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:11.294882Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:11.350567Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:11.350610Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:11.395122Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:12.753726Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:12.852497Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:12.852563Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:13.009447Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:13.047752Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:13.074294Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T21:16:13.074332Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=9031 selected_horizon=9031 endpoint_lower_bound=6912 lower_bound_gap=2119 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:13.217504Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T21:16:13.888747Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:14.009942Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=32942 maximum_identical_destinations=1
2026-09-11T21:16:14.009995Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=16793 selected_horizon=16793 endpoint_lower_bound=13128 lower_bound_gap=3665 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:14.114885Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=385 row_words=748 horizon=16793
2026-09-11T21:16:14.646187Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:16:14.646289Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=9681 selected_horizon=9681 endpoint_lower_bound=6600 lower_bound_gap=3081 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:14.658275Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:14.694747Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:14.694788Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:14.707275Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:14.741328Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:14.741382Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:14.801577Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:14.840020Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=5188 success=true
2026-09-11T21:16:14.890414Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=68 row_words=2655 horizon=9681
2026-09-11T21:16:14.939370Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=10115 success=true
2026-09-11T21:16:14.949585Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=9862 success=true
2026-09-11T21:16:17.823543Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:17.824006Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:17.824847Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:17.824878Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:17.827501Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:17.833536Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:17.835497Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:17.835531Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:17.840171Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=30 row_words=40 horizon=7563
2026-09-11T21:16:17.888058Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:17.895788Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:17.895826Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:17.903116Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:17.914298Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:17.914880Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:17.914897Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:17.918048Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:17.938350Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:17.940723Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:16:17.940781Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:17.942564Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T21:16:17.953810Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:18.030677Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:18.035439Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:18.035468Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.040788Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:18.080278Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:18.080762Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:18.080776Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.082281Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:18.139365Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:18.158522Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:18.158575Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.171157Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:18.212679Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:18.232705Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:18.232740Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.241361Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:18.260289Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:18.261104Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2181 maximum_identical_destinations=1
2026-09-11T21:16:18.261121Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=8725 selected_horizon=8725 endpoint_lower_bound=6912 lower_bound_gap=1813 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.262552Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=55 row_words=43 horizon=8725
2026-09-11T21:16:18.272969Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:18.329026Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:18.334150Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:18.334179Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.338351Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:18.510155Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:18.541327Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:18.541394Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.557995Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:18.853001Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:18.878646Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:18.878678Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.899285Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:18.899718Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:18.905753Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:18.939438Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:18.939481Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.950768Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:18.950806Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:18.983700Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:18.990500Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:19.449941Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:16:19.520919Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:19.520995Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:19.563143Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:16:19.574491Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:19.602651Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:19.602688Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:19.651916Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:20.907790Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:20.907886Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:20.954229Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:16:20.978612Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:21.062851Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:21.062889Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:21.098049Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:21.187135Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:21.187184Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:21.264820Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:21.388609Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:21.808069Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:21.935373Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32464 maximum_identical_destinations=1
2026-09-11T21:16:21.935427Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=7575 selected_horizon=7575 endpoint_lower_bound=6984 lower_bound_gap=591 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:22.020665Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=626 row_words=754 horizon=7575
2026-09-11T21:16:22.154184Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:22.254309Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:22.254360Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:22.336959Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:24.062267Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:24.062331Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:24.109645Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:16:24.467652Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:24.535720Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T21:16:24.535758Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=8460 selected_horizon=8460 endpoint_lower_bound=6912 lower_bound_gap=1548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:24.728455Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=154 row_words=1096 horizon=8460
2026-09-11T21:16:24.799728Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=256575142912 score=112249404416 baseline_cycles=89981 candidate_cycles=87805 row_bytes=14376 row_capacity=16320 accepted=true
2026-09-11T21:16:25.117962Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=10178 success=true
2026-09-11T21:16:25.138033Z  INFO local_candidate{attempt=1}: costed final placed program final_cycles=248195 final_exchange=94405
2026-09-11T21:16:25.298183Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=74 success=true
2026-09-11T21:16:25.333307Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=35 success=true
2026-09-11T21:16:25.571065Z  INFO local_candidate{attempt=1}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=218 success=true
2026-09-11T21:16:27.728240Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:27.728325Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:27.784005Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:16:28.748670Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:28.857679Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=32942 maximum_identical_destinations=1
2026-09-11T21:16:28.857726Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=16793 selected_horizon=16793 endpoint_lower_bound=13128 lower_bound_gap=3665 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:28.946576Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=385 row_words=748 horizon=16793
2026-09-11T21:16:30.476071Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:16:30.544404Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:30.544519Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:30.625160Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:32.011897Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:32.079331Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128104 maximum_identical_destinations=1
2026-09-11T21:16:32.079378Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=9031 selected_horizon=9031 endpoint_lower_bound=6912 lower_bound_gap=2119 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:32.283527Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=159 row_words=1279 horizon=9031
2026-09-11T21:16:32.363161Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=261455760384 score=117130021888 baseline_cycles=92972 candidate_cycles=90796 row_bytes=15024 row_capacity=16320 accepted=true
2026-09-11T21:16:32.596415Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=17756 success=true
2026-09-11T21:16:32.634583Z  INFO local_candidate{attempt=2}: costed final placed program final_cycles=253242 final_exchange=97396
2026-09-11T21:16:32.802453Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=72 success=true
2026-09-11T21:16:32.838938Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=36 success=true
2026-09-11T21:16:33.023675Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:33.083128Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=225 success=true
2026-09-11T21:16:33.118725Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=127912 maximum_identical_destinations=1
2026-09-11T21:16:33.118775Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=9681 selected_horizon=9681 endpoint_lower_bound=6600 lower_bound_gap=3081 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:33.328491Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=68 row_words=2655 horizon=9681
2026-09-11T21:16:35.989073Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:36.100930Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:36.100984Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:36.314149Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:36.386914Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=257769617408 score=113443878912 baseline_cycles=83242 candidate_cycles=81066 row_bytes=20408 row_capacity=32704 accepted=true
2026-09-11T21:16:36.593239Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=21643 success=true
2026-09-11T21:16:36.619539Z  INFO local_candidate{attempt=3}: costed final placed program final_cycles=260298 final_exchange=87666
2026-09-11T21:16:36.781947Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=77 success=true
2026-09-11T21:16:36.818939Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=36 success=true
2026-09-11T21:16:37.059533Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=220 success=true
2026-09-11T21:16:37.545065Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=1 before=264494 after=248195 changed_operations=[] opened_boundaries=[]
2026-09-11T21:16:38.287597Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: evaluating ordered local candidates concurrently candidates=2 threads=12
2026-09-11T21:16:39.667684Z  INFO local_candidate{attempt=2}: screened exchange table geometry expansion_ms=1067 expansion_and_footprint_ms=1379 estimated_row_bytes=22232 heuristic_row_bytes=40292 geometry_fragments_per_tile=2455 fragment_limit=16384
2026-09-11T21:16:39.689370Z  INFO local_candidate{attempt=2}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:16:39.861800Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:39.881877Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:39.882487Z  INFO local_candidate{attempt=3}: screened exchange table geometry expansion_ms=1202 expansion_and_footprint_ms=1594 estimated_row_bytes=20696 heuristic_row_bytes=40292 geometry_fragments_per_tile=2263 fragment_limit=16384
2026-09-11T21:16:39.884440Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:39.884476Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:39.888198Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:39.913110Z  INFO local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:16:39.922352Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:39.922405Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:39.926067Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T21:16:39.976874Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:39.986907Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:39.986946Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:39.997240Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:40.049175Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:40.051172Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:40.051875Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:40.051896Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:40.054286Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:40.144167Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:40.151549Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:40.151587Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:40.158845Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:40.477412Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:40.510127Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:40.510171Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:40.516865Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:40.523645Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:40.544638Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:40.544673Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:40.554709Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:40.554747Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=4 initial_horizon=7214 selected_horizon=7214 endpoint_lower_bound=5184 lower_bound_gap=2030 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:40.557077Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T21:16:40.558252Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:40.913944Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:40.968647Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:40.968700Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:41.011669Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:41.109438Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:41.149250Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:41.149291Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:41.191353Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:41.724761Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:41.824713Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:41.824776Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:41.877581Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:42.172679Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:42.219382Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:42.219428Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:42.272139Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:43.123308Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:43.123373Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=8 initial_horizon=12097 selected_horizon=12097 endpoint_lower_bound=8832 lower_bound_gap=3265 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:43.174365Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=8 tile=933 row_words=262 horizon=12097
2026-09-11T21:16:43.235142Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:43.289335Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:43.289393Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=12097 selected_horizon=12097 endpoint_lower_bound=8832 lower_bound_gap=3265 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:43.319165Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:43.319231Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:43.340623Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=933 row_words=262 horizon=12097
2026-09-11T21:16:43.522055Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:44.256135Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:44.259893Z  INFO local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:44.369631Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:44.369685Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:44.376045Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:44.376091Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:44.449538Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:44.466758Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:44.987319Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T21:16:44.987378Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=5 initial_horizon=7378 selected_horizon=7378 endpoint_lower_bound=5184 lower_bound_gap=2194 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:45.055511Z  INFO local_candidate{attempt=2}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:45.161638Z  INFO local_candidate{attempt=2}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:45.161686Z  INFO local_candidate{attempt=2}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:45.164812Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T21:16:45.400994Z  INFO local_candidate{attempt=2}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:45.465315Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=17 success=true
2026-09-11T21:16:45.469254Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=3 success=true
2026-09-11T21:16:45.471355Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:16:45.505680Z  INFO local_candidate{attempt=2}: exchange table and repeat patch storage exchange_table_bytes=14344 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:16:45.666686Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=40 success=true
2026-09-11T21:16:45.666743Z  INFO local_candidate{attempt=2}: placing generated tile programs linked_end=323352 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2672 exchange_table_bytes=14344 executable_ranges=[(377776, 524288)]
2026-09-11T21:16:45.666759Z  INFO local_candidate{attempt=2}: allocated package support memory linked_end=323352 profile_bytes=200 exchange_table_bytes=14344 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2672 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T21:16:45.761953Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=95 success=true
2026-09-11T21:16:45.778619Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:45.781079Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:45.781962Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:45.781995Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:45.784269Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:45.857231Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:45.858807Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:45.858834Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:45.861553Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T21:16:45.869546Z  INFO local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T21:16:45.869610Z  INFO local_candidate{attempt=3}: optimized physical exchange schedule phase=5 initial_horizon=7428 selected_horizon=7428 endpoint_lower_bound=5184 lower_bound_gap=2244 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:46.025670Z  INFO local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T21:16:46.743616Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:46.782501Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:46.782543Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:46.822698Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:47.294430Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:47.340575Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:47.340619Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:47.383620Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:49.078514Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:49.078587Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:49.140315Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:49.860862Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:49.973178Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:49.977015Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:49.977067Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:50.063588Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:50.077053Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T21:16:50.077113Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=7378 selected_horizon=7378 endpoint_lower_bound=5184 lower_bound_gap=2194 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:50.169515Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:50.176441Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:50.176478Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:50.184073Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:50.258039Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T21:16:50.641650Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:50.649688Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:50.679628Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:50.679665Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:50.693065Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:50.735846Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:50.735886Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:50.937027Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:50.968478Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=5206 success=true
2026-09-11T21:16:50.978781Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=11 success=true
2026-09-11T21:16:50.980943Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=2 success=true
2026-09-11T21:16:50.983325Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:16:51.020082Z  INFO local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=13760 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:16:51.175345Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=37 success=true
2026-09-11T21:16:51.175395Z  INFO local_candidate{attempt=3}: placing generated tile programs linked_end=323384 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2720 exchange_table_bytes=13760 executable_ranges=[(377776, 524288)]
2026-09-11T21:16:51.175414Z  INFO local_candidate{attempt=3}: allocated package support memory linked_end=323384 profile_bytes=200 exchange_table_bytes=13760 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2720 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T21:16:51.264440Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=89 success=true
2026-09-11T21:16:51.278905Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:51.282159Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:51.282924Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:51.282947Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:51.285164Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:51.322934Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:51.324063Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:51.324091Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=7214 selected_horizon=7214 endpoint_lower_bound=5184 lower_bound_gap=2030 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:51.326551Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T21:16:52.262431Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:52.302795Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:52.302833Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:52.341704Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:52.862238Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:16:52.921157Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:52.921198Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:52.967165Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:16:53.744452Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:53.745306Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:53.745329Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:53.747834Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:53.837974Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:53.844488Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:53.844517Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:53.851326Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:53.869305Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:53.906455Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:53.907378Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:53.907398Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=7563 selected_horizon=7563 endpoint_lower_bound=5184 lower_bound_gap=2379 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:53.909586Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=134 row_words=39 horizon=7563
2026-09-11T21:16:54.178667Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:54.205153Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:54.205193Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:54.215743Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:54.424249Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:54.526554Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:54.526618Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:54.560570Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:54.560624Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:54.582672Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:54.749400Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:16:54.760151Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:54.786085Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:16:54.786133Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:54.826583Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:16:54.866816Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:54.879138Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:54.879172Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:54.886455Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:16:55.316629Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:16:55.348682Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:16:55.348728Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:55.362590Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:16:55.463698Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:16:55.503561Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:55.509576Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:16:55.509619Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:55.566078Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:16:55.623392Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:55.623443Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:55.707283Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:55.870972Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:56.013191Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T21:16:56.013282Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=7428 selected_horizon=7428 endpoint_lower_bound=5184 lower_bound_gap=2244 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:56.158325Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T21:16:56.642073Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:16:56.642145Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:16:56.700541Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:16:56.898472Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:16:56.993999Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:16:56.994047Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:57.226066Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:16:57.263182Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=5998 success=true
2026-09-11T21:16:57.827154Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:16:57.908189Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128156 maximum_identical_destinations=1
2026-09-11T21:16:57.908258Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=7378 selected_horizon=7378 endpoint_lower_bound=5184 lower_bound_gap=2194 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:58.057659Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:16:58.090052Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=154 row_words=1079 horizon=7378
2026-09-11T21:16:58.174041Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:16:58.174089Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:58.263618Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:16:58.336137Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=267834191872 score=123508453376 baseline_cycles=87737 candidate_cycles=85561 row_bytes=14272 row_capacity=16320 accepted=true
2026-09-11T21:16:58.464586Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=7495 success=true
2026-09-11T21:16:58.482287Z  INFO local_candidate{attempt=2}: costed final placed program final_cycles=244457 final_exchange=92161
2026-09-11T21:16:58.614598Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=71 success=true
2026-09-11T21:16:58.642822Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=28 success=true
2026-09-11T21:16:58.806327Z  INFO local_candidate{attempt=2}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=138 success=true
2026-09-11T21:16:59.807810Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:16:59.808399Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:16:59.809399Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:16:59.809424Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:59.812107Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:16:59.843492Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:16:59.844592Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=2182 maximum_identical_destinations=1
2026-09-11T21:16:59.844615Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=7214 selected_horizon=7214 endpoint_lower_bound=5184 lower_bound_gap=2030 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:59.847269Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=165 row_words=39 horizon=7214
2026-09-11T21:16:59.931283Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:16:59.936688Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:16:59.936719Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:16:59.942975Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:17:00.090990Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:17:00.110227Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:17:00.110264Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:00.118636Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:17:00.728943Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:17:00.765341Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:17:00.765382Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:00.804528Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:17:01.465822Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:17:01.515364Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:17:01.515403Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:01.579045Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:17:02.608506Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:17:02.608575Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:17:02.661568Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:17:02.883019Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:17:02.972798Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:17:02.972838Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:03.173744Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:17:03.912982Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:17:04.023371Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:17:04.023419Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:04.104399Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:17:06.796329Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:17:06.894084Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T21:17:06.894153Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=7428 selected_horizon=7428 endpoint_lower_bound=5184 lower_bound_gap=2244 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:07.034083Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=142 row_words=932 horizon=7428
2026-09-11T21:17:07.098574Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=268263073280 score=123937334784 baseline_cycles=87438 candidate_cycles=85262 row_bytes=13688 row_capacity=16320 accepted=true
2026-09-11T21:17:07.239284Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=9976 success=true
2026-09-11T21:17:07.249103Z  INFO local_candidate{attempt=3}: costed final placed program final_cycles=244906 final_exchange=91862
2026-09-11T21:17:07.410386Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=73 success=true
2026-09-11T21:17:07.443551Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=33 success=true
2026-09-11T21:17:07.677300Z  INFO local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=215 success=true
2026-09-11T21:17:08.091729Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=2 before=248195 after=244457 changed_operations=[4] opened_boundaries=[3]
2026-09-11T21:17:08.733197Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: evaluating ordered local candidates concurrently candidates=1 threads=12
2026-09-11T21:17:10.298672Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: screened exchange table geometry expansion_ms=1202 expansion_and_footprint_ms=1565 estimated_row_bytes=20280 heuristic_row_bytes=38672 geometry_fragments_per_tile=2212 fragment_limit=16384
2026-09-11T21:17:10.333068Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: eliminated unread FP8 cast input padding clears removed=0
2026-09-11T21:17:10.443306Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:17:10.452138Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=4 transfers=1607 maximum_identical_destinations=1
2026-09-11T21:17:10.452196Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=4 initial_horizon=5319 selected_horizon=5319 endpoint_lower_bound=3456 lower_bound_gap=1863 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:17:10.454458Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=4 tile=56 row_words=35 horizon=5319
2026-09-11T21:17:10.523170Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:17:10.529145Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:17:10.529177Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:10.535602Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:17:11.442755Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:17:11.488726Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:17:11.488773Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:11.531038Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:17:12.017393Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:17:12.060012Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:17:12.060054Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:12.101269Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:17:13.846149Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:17:13.846240Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=8 initial_horizon=12097 selected_horizon=12097 endpoint_lower_bound=8832 lower_bound_gap=3265 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:17:13.914994Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=8 tile=933 row_words=262 horizon=12097
2026-09-11T21:17:13.960985Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:17:13.962126Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:17:13.962154Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:13.965141Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:17:14.452981Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:17:14.453875Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:17:14.488999Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:17:14.489041Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:14.503928Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:17:14.584829Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:17:14.584881Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:14.670955Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:17:16.939898Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T21:17:16.939971Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=5 initial_horizon=5761 selected_horizon=5761 endpoint_lower_bound=3456 lower_bound_gap=2305 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:17:17.084362Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=5 tile=79 row_words=879 horizon=5761
2026-09-11T21:17:17.734010Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:17:17.840522Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:17:17.840578Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:18.035016Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:17:18.074509Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="plan_kernels"}: package build phase finished phase="plan_kernels" elapsed_ms=13 success=true
2026-09-11T21:17:18.076696Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="compile_kernels"}: package build phase finished phase="compile_kernels" elapsed_ms=2 success=true
2026-09-11T21:17:18.078873Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="link_runtime"}: package build phase finished phase="link_runtime" elapsed_ms=0 success=true
2026-09-11T21:17:18.119396Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: exchange table and repeat patch storage exchange_table_bytes=13632 maximum_uncompressed_repeat_patch_bytes=0 maximum_elided_arithmetic_patch_bytes=0
2026-09-11T21:17:18.285401Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="size_tile_code"}: package build phase finished phase="size_tile_code" elapsed_ms=41 success=true
2026-09-11T21:17:18.285464Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: placing generated tile programs linked_end=323384 host_code_base=376832 host_code_bytes=876 generated_code_bytes=2640 exchange_table_bytes=13632 executable_ranges=[(377776, 524288)]
2026-09-11T21:17:18.285478Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: allocated package support memory linked_end=323384 profile_bytes=200 exchange_table_bytes=13632 host_code_bytes=876 host_data_bytes=664 generated_code_bytes=2640 code_address=377776 available_ranges=[(327680, 360448), (362872, 376832), (409600, 524288), (524488, 949168)]
2026-09-11T21:17:18.371170Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="place_storage"}: package build phase finished phase="place_storage" elapsed_ms=85 success=true
2026-09-11T21:17:18.396116Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:17:18.401472Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:17:18.402459Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:17:18.402485Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:18.405657Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:17:18.458127Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:17:18.459514Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=4 transfers=1607 maximum_identical_destinations=1
2026-09-11T21:17:18.459535Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=4 initial_horizon=5319 selected_horizon=5319 endpoint_lower_bound=3456 lower_bound_gap=1863 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:18.462047Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=4 tile=56 row_words=35 horizon=5319
2026-09-11T21:17:18.534992Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:17:18.551239Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:17:18.551297Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:18.561749Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:17:19.346086Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:17:19.387034Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:17:19.387076Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:19.426959Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:17:19.966829Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=7
2026-09-11T21:17:20.008965Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:17:20.009019Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=7 initial_horizon=8288 selected_horizon=8288 endpoint_lower_bound=3480 lower_bound_gap=4808 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:20.059288Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=7 tile=874 row_words=325 horizon=8288
2026-09-11T21:17:21.441282Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:17:21.441371Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:17:21.442442Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:17:21.524342Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:17:21.619322Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:17:21.619376Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:21.837314Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:17:22.531735Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:17:22.648174Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:17:22.648253Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:22.729349Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:17:23.233087Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:17:23.273918Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:17:23.273968Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:23.290648Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:17:24.455272Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:17:24.564259Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T21:17:24.564313Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: optimized physical exchange schedule phase=5 initial_horizon=5761 selected_horizon=5761 endpoint_lower_bound=3456 lower_bound_gap=2305 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:24.702717Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: finished large physical exchange phase phase=5 tile=79 row_words=879 horizon=5761
2026-09-11T21:17:24.730883Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="lower_exchanges"}: package build phase finished phase="lower_exchanges" elapsed_ms=6359 success=true
2026-09-11T21:17:27.430121Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=1
2026-09-11T21:17:27.430794Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=2
2026-09-11T21:17:27.431650Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=2 transfers=1404 maximum_identical_destinations=1
2026-09-11T21:17:27.431684Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=2 initial_horizon=8001 selected_horizon=8001 endpoint_lower_bound=7872 lower_bound_gap=129 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:27.433943Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=2 tile=341 row_words=13 horizon=8001
2026-09-11T21:17:27.488267Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=4
2026-09-11T21:17:27.489073Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=4 transfers=1607 maximum_identical_destinations=1
2026-09-11T21:17:27.489088Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=4 initial_horizon=5319 selected_horizon=5319 endpoint_lower_bound=3456 lower_bound_gap=1863 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:27.491129Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=4 tile=56 row_words=35 horizon=5319
2026-09-11T21:17:27.516289Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=10
2026-09-11T21:17:27.522420Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=10 transfers=11656 maximum_identical_destinations=1
2026-09-11T21:17:27.522450Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=10 initial_horizon=2455 selected_horizon=2455 endpoint_lower_bound=2304 lower_bound_gap=151 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:27.528002Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=10 tile=163 row_words=110 horizon=2455
2026-09-11T21:17:28.394804Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=9
2026-09-11T21:17:28.434052Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=9 transfers=59200 maximum_identical_destinations=1
2026-09-11T21:17:28.434106Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=9 initial_horizon=3188 selected_horizon=3188 endpoint_lower_bound=2640 lower_bound_gap=548 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:28.475302Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=9 tile=412 row_words=150 horizon=3188
2026-09-11T21:17:28.958843Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=8
2026-09-11T21:17:29.012364Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=8 transfers=72320 maximum_identical_destinations=1
2026-09-11T21:17:29.012411Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=8 initial_horizon=12092 selected_horizon=12092 endpoint_lower_bound=8832 lower_bound_gap=3260 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:29.074064Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=8 tile=262 row_words=264 horizon=12092
2026-09-11T21:17:30.462217Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=7 transfers=66288 maximum_identical_destinations=1
2026-09-11T21:17:30.462286Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=7 initial_horizon=6112 selected_horizon=6112 endpoint_lower_bound=3480 lower_bound_gap=2632 selected_kind="balanced-compact-streams" neighborhood_improvements=0
2026-09-11T21:17:30.512999Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=7 tile=874 row_words=295 horizon=6112
2026-09-11T21:17:30.884466Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=3
2026-09-11T21:17:31.008256Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=3 transfers=156776 maximum_identical_destinations=1
2026-09-11T21:17:31.008308Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=3 initial_horizon=4002 selected_horizon=4002 endpoint_lower_bound=3456 lower_bound_gap=546 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:31.207615Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=3 tile=197 row_words=1011 horizon=4002
2026-09-11T21:17:31.485357Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=6
2026-09-11T21:17:31.602370Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=6 transfers=33420 maximum_identical_destinations=1
2026-09-11T21:17:31.602431Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=6 initial_horizon=14373 selected_horizon=14373 endpoint_lower_bound=13128 lower_bound_gap=1245 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:31.680394Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=6 tile=385 row_words=749 horizon=14373
2026-09-11T21:17:31.719736Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=0
2026-09-11T21:17:31.750132Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=0 transfers=3480 maximum_identical_destinations=1
2026-09-11T21:17:31.750179Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=0 initial_horizon=14130 selected_horizon=14130 endpoint_lower_bound=14016 lower_bound_gap=114 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:31.763646Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=0 tile=54 row_words=167 horizon=14130
2026-09-11T21:17:32.005194Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: reused exchange optimization after validating relocated rows phase=5
2026-09-11T21:17:32.104417Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: prepared large physical exchange phase phase=5 transfers=128060 maximum_identical_destinations=1
2026-09-11T21:17:32.104459Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: optimized physical exchange schedule phase=5 initial_horizon=5761 selected_horizon=5761 endpoint_lower_bound=3456 lower_bound_gap=2305 selected_kind="reused" neighborhood_improvements=0
2026-09-11T21:17:32.252287Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: finished large physical exchange phase phase=5 tile=79 row_words=879 horizon=5761
2026-09-11T21:17:32.331454Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: evaluated exchange placement candidate offset=16384 baseline_score=273543573760 score=129217835264 baseline_cycles=83876 candidate_cycles=81700 row_bytes=13560 row_capacity=16320 accepted=true
2026-09-11T21:17:32.479488Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="optimize_exchange_placement"}: package build phase finished phase="optimize_exchange_placement" elapsed_ms=7748 success=true
2026-09-11T21:17:32.488417Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}: costed final placed program final_cycles=239850 final_exchange=88300
2026-09-11T21:17:32.645271Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="prepare_tile_code"}: package build phase finished phase="prepare_tile_code" elapsed_ms=70 success=true
2026-09-11T21:17:32.677732Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="emit_tile_code"}: package build phase finished phase="emit_tile_code" elapsed_ms=32 success=true
2026-09-11T21:17:32.908885Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}:local_candidate{attempt=3}:ipu_codegen.package.phase{phase="build_tile_images"}: package build phase finished phase="build_tile_images" elapsed_ms=209 success=true
2026-09-11T21:17:33.009163Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: accepted local layout improvement attempt=3 before=244457 after=239850 changed_operations=[5] opened_boundaries=[4]
2026-09-11T21:17:33.594082Z  INFO ipu_codegen.package.build{tile_count=1472 operations=8}:ipu_codegen.package.phase{phase="plan_package"}: package build phase finished phase="plan_package" elapsed_ms=150280 success=true
2026-09-11T21:17:33.719244Z  INFO writing application package tiles=1472
2026-09-11T21:17:33.852808Z  INFO application package written
2026-09-11T21:17:33.853130Z  INFO reading application package
2026-09-11T21:17:34.072527Z  INFO application package read tiles=1472 compiler=0.1.0
2026-09-11T21:17:34.073486Z  INFO waiting for hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-11T21:17:34.073512Z  INFO acquired hardware ownership path=artifacts/layout-sweep/device.lock
2026-09-11T21:17:34.073520Z  INFO opening IPU device path="/dev/ipu0"
2026-09-11T21:17:34.073563Z  INFO IPU device attached path=/dev/ipu0
2026-09-11T21:17:34.073569Z  INFO initializing IPU device
2026-09-11T21:17:34.081441Z  INFO IPU device initialized
2026-09-11T21:17:34.081492Z  INFO replaying device configuration register_writes=2003
2026-09-11T21:17:34.089015Z  INFO loading application tile_count=1472 final_mark=23
2026-09-11T21:17:34.299459Z  INFO application loaded and initial synchronization completed tile_count=1472
2026-09-11T21:17:34.951454Z  INFO prepared reference inputs elapsed_ms=650
2026-09-11T21:17:35.235850Z  INFO configured host reference BLAS threads=4
referencePrecision=device
2026-09-11T21:17:35.681259Z  INFO evaluated host reference elapsed_ms=729
2026-09-11T21:17:35.683905Z  INFO starting host exchange session startup_mark=23
2026-09-11T21:17:35.684000Z  INFO attaching host exchange pages pages=2
2026-09-11T21:17:35.686731Z  INFO host exchange session started
2026-09-11T21:17:35.686866Z  INFO invoking streaming host exchange call call="initialize" command=0 phases=2
2026-09-11T21:17:35.689043Z DEBUG host phases: (phase, ready, copy, acknowledge, wait) microseconds call="initialize" elapsed_us=2142 input_bytes=3981312 output_bytes=0 input_batches=1 output_batches=0 timings=[(0, 1, 806, 1, 0), (1, 0, 0, 0, 1327)]
2026-09-11T21:17:35.689420Z  INFO invoking streaming host exchange call call="run" command=0 phases=17
2026-09-11T21:17:35.692637Z DEBUG host phases: (phase, ready, copy, acknowledge, wait) microseconds call="run" elapsed_us=3190 input_bytes=839808 output_bytes=1915780 input_batches=3 output_batches=6 timings=[(0, 0, 76, 0, 167), (1, 0, 0, 0, 157), (2, 0, 63, 0, 157), (3, 0, 0, 0, 155), (4, 0, 23, 0, 158), (5, 0, 0, 0, 156), (6, 0, 0, 0, 157), (7, 0, 0, 0, 323), (8, 0, 236, 0, 0), (9, 0, 0, 0, 328), (10, 0, 214, 0, 0), (11, 0, 0, 1, 336), (12, 0, 110, 0, 0), (13, 0, 0, 0, 158), (14, 0, 7, 0, 0), (15, 0, 0, 1, 158), (16, 0, 10, 0, 0)]
2026-09-11T21:17:35.710371Z DEBUG resident invocation including output collection inference=0 collect_us=9 elapsed_us=21224
profile=artifacts/fp8-attention-20260911/qk/model.ipuprof tiles=1472 samples=54625
referenceInference=1 numericalTest=PASS
referenceMaximumAbsoluteError=0.000145 numericalTest=PASS
package=artifacts/fp8-attention-20260911/qk/model.ipuexe tiles=1472 hardwareTest=PASS